What happens when a plant come in contact with a support Share with your friends Share 0 Vartika Jain answered this Dear Student, In weak plants, the cells of the tip of the tendril produces auxins. Auxin is a growth promoting plant hormone. When a tendril comes in contact with a support, auxin stimulates faster growth of cells. It directs growth on the opposite side and so the tendril forms a coil around the support. 0 View Full Answer Dharshanaa answered this Auxin is produced at the site where the plant is in contact with and the hormone is targeted away from the site the the plant grows and curls around the suppot 0 L.vibha answered this Auxin accumulates in the part which is not in contact with the support. This results in the greater elongation of that part than the part in contact with the support. Due to this the Tendril or the part of the plant tends to curve around the support.Hope this helps! 2